Process for metallizing with reflecting highly polished surface celluloid in sheets and any other form by chemical means



Patented Dec. 26, 1933 .UNITED STATES PATENT; OFFICE Karl Kiefer, Dresden, Germany No Drawing. Application March 3, 1932, Serial No. 596,568, and in Germany September 15,

2 Claims. (CI. 91-683) It is already known, to produce metallic effects with celluloid and similar products. Further, celluloid can be metallized by galvanic process or by mechanical means by pressing on a metal 5 layer. It is however not selfreflecting. It has also not hitherto been possible to produce a highly polished efiect by a preliminary treatment.

According to the invention all hitherto existing objections in the metallizing of celluloid,

l0 gelatine and the like are overcome, and it is rendered possible to employ as mirror celluloid treated according to the new process.

This applies both for the metal side directed towards the celluloid and also for the exposed 16 side. .Both metal sides have a reflecting high polish without subsequent treatment.

Moreover, it is not necessary to apply an intermediate layer, as the silver nitrate solution can be applied directly onto the celluloid.

20 The characteristic feature of the. invention consists in that the celluloid before applying the silver nitrate coating is treated with a tin salt solution containing alcohol.

Thus the surface of the celluloid is made absolutely level and the applied separating silver or metal layer also applies itself absolutely plane, so that the silver layer itself can reflect.

The preliminary treatment may be carried out on one side or on both sides of the celluloid, and the exposed metallic side may be further covered with a protecting coating or zapon or the like.

It is also possible according to the above described process to silver plate or metallize with a high polish paper, wood, textiles, gelatines and similar and allied materials and bodies in a similar manner to. all shapes and structures of celluloid, in that these materials and bodies are covered with a celluloid coating by dipping, painting, spraying or the like, and this coating is subsequently treated as above described.

I claim:-

1. A process for metallizing with a reflecting, highly polished surface celluloid and the like in sheets and in any other form by chemical process, consisting in treating the celluloid with a tin salt solution containing alcohol and in subsequently metallizing the treated surface.

2. A process for metallizing with a reflecting highly polished surface paper, wood, textiles, gelatines, and similar materials, consisting in coating the material with celluloid, treating the coating with a tin salt solution containing alcohol, and metallizing the treated celluloid coat- B.

KARL ICEFER. 

